In water, these molecules spontaneously align â with their heads facing outward and their tails lining up in the bilayer's interior. Thus, the hydrophilic heads of the glycerophospholipids in a cell's plasma membrane face both the water-based cytoplasm and the exterior of the cell.
An MRI (magnetic resonance imaging) scan is an imaging test that uses powerful magnets and radio waves to create pictures of the body. It does not use radiation (x-rays). Single MRI images are called slices. The images can be stored on a computer or printed on film.
What is an MRI arthrogram? An MRI arthrogram exam is an imaging study. It is used to take detailed pictures of your joints. MRI stands for magnetic resonance imaging. This exam has 2 parts. First you will have an arthrogram and then an MRI. This 2-part exam shows more details of your joint than an MRI by itself.